Improvement in machines for making pails from paper-pulp



M. E; HUBBARD. Machine for Making Pai'lsfrom Paper-Pulp.

No. 202,547. Patented April 16,1878.

INVENTOR- flW Ad e-L 6'. J/ ,4; JV. and x6 WITNESSES;

TERS, FHOTO LWHDGRAPM ER. WASHINGTON, D C

UNITED STATES PATENT QFFIGE.

MARSHALL E. HUBBARD,

OF MEDINA, NEW YORK.

IMPROVEMlENT lN MACHINES FOR MAKING PAILS FROM PAPER-PULP.

Specification forming part of Letters Patent No. 202,547, dated April16, 1878; application filed June 7, 1877.

To all whom it may concern:

Be it known that I, MARSHALL E. HUB- BARD, of Medina, in the county ofOrleans and State of New York, have invented certain new and usefulImprovements in Machines for Making Pails from Paper-Pulp, of which thefollowing is a clear, full, and exact description, reference beinghad tothe accompanying drawing, forming a part of this specification, inwhich- Figure 1 is a perspective View of my improved machine. Fig. 2 isa vertical section of Fig. 1. Fig. 3 is a top or plan view. Fig. 4 is aperspective view of the inner sectional form.

' My invention relates to improvements in machines for making pails frompaper-pulp, and has for its object to simplify the construction of suchmachines and the invention therefore consists of an outerperforatedconical form, the inner walls of which are covered withsuitable material to form a strainer, and in other details ofconstruction, all as hereinafter fully described.

In the drawing, A represents an outer perforating conical form, made ofmetal or other suitable material, in a single piece, and of sufficientthickness to give the requisite strength, and it is secured to or formsa part of the support B. The inner walls of this form correspond inshape and size to the outside of the pail desired, and it is coveredwith any suitable percolating material to form a strainer. This form isprovided with a removable fiat ring, 0, which-rests loosely upon theledge b formed upon the support B or lower edge of the conical form A,and upon this ring is formed the edge of the small end of the pail.

The ring is also used for the purpose of raising the pail when pressedin any suitable manner from below, thus raising the pressed pulp partlyup and out of the form, so that it may be easily and readily removed.This outer form is also provided with a detachable ring I or flange,resting on the top or large edge of the form C, and projecting towardthe center, against which the edge of the large end of the pail isformed, and is secured in position by the eyebolt c or other suitabledevices. The form is further provided with the central vertical rod D,secured to the cross-bar E on the bottom of the support 13.

F represents the inner perforated conical form, constructed of anysuitable material, made in vertical sections f, and of which any desirednumber may be used, and arranged in such manner that the form may beexpanded or contracted, and when properly expanded conforms to the sizeand shape of the inside of the pail desired. The sections of this formare covered upon their outer surfaces with any suitable perforatedmaterial to form a strainer. Each section is also provided, near itslower edge on the outer surface, with a narrow rib, 0, running across itin such manner as when the inner form is expanded and comes in contactwith the pulp the ribs will form a croze or groove for the reception ofthe edge of the pail-bottom, and also each section, from the rib to itslower end, is cut back from the general outside surface of the section,so as to form a shoulder for the support of the bottom of the pail, inaddition to the croze or groove, and also make the chine thick andstrong.

The sections f of the form are held in position and expanded andcontracted by means of the arms 9, fastened to their interior surfaces,so as to form a joint at their connection, and the other ends of thearms being secured in a similar manner to a central tube or sleeve, G,which passes over the central rod D of the outer form, thereby keepingthe inner form in the center of the outer form. Raising the tube orsleeve with one end of the arms attached thereto contracts the innerform,,and by forcing it downward expands it.

To prepare the material for my machine a flat press is used, made of anysuitable material, the sides of which are made in the arc of a circle,and the radius of which corresponds with the large and small ends of thepai l,should one be cut open on one side and laid out flat. The ends ofthe press are straight, and the bottom is perforated and covered withany suitable material to form a strainer. I The press is made of anydesired depth, and the inner sides thereof are made vertical. The pressis also provided with a cover or follower, which corresponds in shapetherewith.

The following is a description of the method employed for making a pail:Fill the press above described with pulp then place the cover orfollower thereon, and bring sufficient pressure to expel the greaterpart of the water,

tions in both the inner and outer forms.

when the cover may be removed, and by commencing at one end of the pressthe pulp may be rolled up into a bundle. The inner form may then becontracted or removed and the pulp placed in the outer form by unrolling the bundle and letting the small end rest upon the loose ring 0, andcompletely covering the inner Walls of the form, and making a lap which,When pressed in its'soft condition, readily becomes one solid andcontinuous mass. The removable ring 0 is then secured in position on topof the form. The inner sectional form is then introduced and thetube orsleeve forced downward, which expands said form, whereby great pressureis brought to bear upon the pulp with comparatively little force, thewater therefrom being expelled through the perfora- As theinner formexpands openings occur between the sections, which, however, are slight,and the pulp at these openings does not receive the requisite amount ofpressure required. The form is then contracted and turned one-half thewidth of one of its sections, when it is again expanded, therebysmoothly packing the pulp both on the inner and outer sides thereof. Thering 0' is then removed, also the inner form, and the loose ring 0 atthe bottom is forced upward, so that the pulp standing or resting on itis readily removed.

What I claim as new, and desire to secure by Letters Patent, is-

1. An outer conicalperforated form in a single piece, having the innerwalls covered with suitable perforated material to form a strainer,substantially as and for the purpose-specified.

2. The combination of the outer perforated form, having the removablering 0 and central vertical rod D, and the sectional inner conical form,constructed substantially as described, and having the jointed arms andcentral tube or sleeve, substantially as and for the purpose specified.

MARSHALL E. HUBBARD.

Witnesses Tnos. A. BURKE, FRANK P. HUNT.

